Power set-works for saw-carriages.



Nm "7i/m13. PATENTED DB0. 13, 1904. R. W. TULLOUH a P. BARNES. www sm?WORKS EUR SAW CARRIAGES.

APPLIUATION FILED NOV. 23, 1908.

3 SHEETS-SHEET l.

NOA MDBL.

win/Essi Nm 777,318, PATENTED DEG. 13, HMMl R. VSL TULLH in BARNES.

POWER SET WRKS POR SAW CARRIAGBS.

APPLICATION FILED NUV) 23, 1903.

NO MODEL,

I/V/TA/,SQSESl /wf XK @gli 110.777.318. 'PATBNTED DEC. 13, 1904. R. W.TULLOGH & P. BARNES.-

POWER SET WORKS FOR SAW UARRIAGE'S.

APPLHIGATION FILED 11017.23, 1903.

HBBTS-BHEET 3.

N0 MODEL.

L@ i w IMM! /Nl/ENTUHS UNITED STATES Patented December 13, 1904.

PATENT OEEICE.

POWER SET-WORKS FOR SAW-CARFHAGES.

SPECIFICATION forming part-of Letters Patent No. 777,318, dated December13, 1904.

Applicatign led November 23, 1903. Serial No. 182.342. (No model.)

To rtZZ 'whom it 'may concern:

Be it known that we, Ross W. TULLocn and PIERRE BARNES, citizens of theUnited States, residing' at Seattle, in the county of King and State ofVashington, have invented certain new and useful Improvements in PowerSet- VVork's for Saw-Carriages, of which the following is aspecification, reference being had therein to the accompanying'drawings.

This invention relates to power-actuated setworks forsawinill-carriagcs; and the object of our invention is the provision ofa simple, inexpensive, but effective apparatus for advancing or recedingexpeditiously the knees upon the head-blocks of a saw-carriage.

The several features of our invention and the advantages arising fromtheir use, conjointly or otherwise, will be apparent from the followingdescription, taken in connection with the accompanying drawings, inwhich- Figure 1 is a longitudinal elevation of a sawcarriage to whichour invention is applied, and Eig. 2 is a plan view of the same. Fig. 3is an enlarged horizontal section of powertransmission devices shown inthe preceding views. Fig. l is a vertical transverse section taken online a' a' through a liead-block,\vlie1'e in is shown a knee actuated bya screw-shaft. Fig. 5 is a similar view on line l/ e/ of Eig. 6, whereina knee provided with a rack is actuated by a pinion upon the set-shaft;and Fig. 6 is a plan View, partly in section, of the invention appliedto such an arrangement.

Similar reference characters indicate corresponding parts in all of theviews.

The numeral 2 represents a saw-carriage having supporting-wheels 3,which travel on traek-rails l,laid upon the mill-floor. The carriage isprovided with transversely-arranged head-blocks 5,upon which arepositioned knees 6, which are reciprocally movable thereon andtransversely of the carriage by a longitudinally-disposed rotatableset-shaft 7.

The motion of the set-shaft is usually cornmunicated to move thekneeseither by spurpinions 8 upon the said shaft, which engage withracks 9, provided upon the respective knees, as plainly shown in Figs. 5and 6, or by screw-shafts 10, provided for the several head-blocks andwhich respectively engage with a registering nut 10', integrallyconnected to each knee, and the said screws are rotated in unison fromthe set-shaft by mitergears l1. (See Figs. 1, 2, and 4.)

The application of the invention to the lastreferred-toconstructionuthat is, screw devices-which is most commonly used in thosesections of the country where big timber is eut and where powerset-works are most needed, will now be described.

Extending transversely of the carriage and journaled in suitable boxes,such as 12, rigidly secured thereto, is a powi-ir-shaft 1?),which isdriven by .suitable means, such as an endless cable 111, travelingcontinuously about sheaves 15 and '1,6 upon counter-shafts 15 and 1G',respectively, and preferably positioned at such a distance beneath themill-floor that the sheaves will protrude thereabove and deliver thecable in line with the fair-leaders or idler-sheaves presently referredto. Either of the said sheaves may be the driver, and a tightenerdevice, such as a sheave 17 on a movable shaft 17', is advantageouslyutilized to insure an effective tension or grip of the cable upon thedriving-sheave aforementioned and a sheave 18, which is lixedly mountedupon the said power-shaft.

The idler-sheaves 19, mounted upon axles or shafts 19', journaled inboxes 19, are a1'- ranged to deflect the cable for the purpose ofincreasing the length of circumferential contact with the sheave 18 andalso guide the eable so that it will travel close to the floor.

Driving' and driven elements 2O and 21, respectively, are mounted uponthe power-shaft and the set-shaft or upon an intermediate shaft andconsist in the construction illustrated of intermeshing beif'ehtoothgear-wheels, the driving element being keyed or otherwise secured to thepower-shaft, while the driven elements are mounted normally loose upontheir shaft and positioned upon diametrically 4 opposite sides of thepower-shaft axis and in consequence are rotated in opposite directionsand coincidently with the power-shaft. We preferably use two of saiddriving elements of different diameters in order to impart a higher rateof travel when receding than when advancing the knees; but when underpeculiar conditions this may be deemed to be unimportant a singledriving element, as shown in IOO Eig. 6, would be the less expensiveconstruction. Any suitable clutch device capable of independentlyengaging either of the driven elements to its shaft may be used toimpart a rotary motion to the latter from the powershaft; but we preferthe one illustrated in the drawings comprising a sleeve 22, splined tothe set-shaft, so as to integrally rotate therewith, but be movableaxially thereof, and provided with conical-shaped ends 23, whichrespectively register with recesses 24, provided in the opposing ends ofthe driven elements. The longitudinal movement of the said sleeve orclutch member is controlled by suitable means-such as a shifting-lever25, fulcrumed at 25', and which is pivotally connected by studs 26 witha collar 27, seated in a peripheral groove 28 in the said sleeve. Thelever may be provided with a handle for the attendant to grasp inshifting the sleeve, though for convenience in operation the said leveris preferably connected with a supplemental or working lever 29 by areach-rodBO, provided with a turnbuckle 30 for adjusting its length.

31 is a sector-plate having a notch 32 therein so disposed as to engagea spring-actuated locking-bolt 33, carried by the lever 29, and normallyretain the clutch-controlling connections in such positions that thesliding clutch member will be at its inoperative positionthat is to say,disengaged from the driven elements. l

34 represents set-collars provided to prevent the end thrust receivedfrom the sliding clutch member from displacing the said driven elementswhen being coupled to the shaft.

Where it is desirable to make a further reduction of speed than canconveniently be accomplished by a single pair of gearswas, for instance,with the pinion and rack sets-an intermediate shaft 35, with suitabletransmission-gear 36, (see Fig. 6,) may be included in the connectionbetween the power and set shafts.

The operation of the invention is as follows: The cable, travelingcontinuously, rotates the power-shaft and also through the drivingelement thereupon the normally loose driven elements in reversedirections upon the setshaft. When the knees are to be advanced orreceded, then the driven element which will impart the required forwardor backward motion thereto is engaged to the shaft by simply thrustingthe sliding clutch member into operative engagement therewith. 1t shouldbe mentioned that where provision is made for rotating the set-shafts atdifferent speeds the slower motion should be utilized for advancing theknees, as greater precision or accuracy can thereby be attained insuccessively setting forward the saw-log to distances equal to thethickness of the required cuts, while oftentimesas, for example, when anew log is to be received upon the earriage-it is important that thebackward movement of the knees should be attained with celerity, therebyminimizing the loss of time,

as is inherent in the use of all such apparatus for this purposeheretofore in use and within our knowledge, and which is accomplishedthrough this invention by the use of the means for receding the knees ata relatively high rate of speed.

Having thus described our invention, what we claim as new, and desire tosecure by Letters Patent, is-

l. In a power set-works for saw-carriages, the combination of apower-shaft and means for rotating the same, toothed bevel-gears xedlysecuredlto said power-shaft, a setshaft arranged at right ang'les tosaid powershaft, a pair of oppositely-disposed toothed bevel drivengears loosely mounted upon the set-shaft and meshing with saiddriving-gears continuously, a sleeve splined upon said setshaftintermediate the gears thereof, clutch elements carried by said sleevecooperating with clutch elements carried by said driven gears, and meansfor sliding said sleeve.

2. In a power set-works for saw-carriages, the combination of apower-shaft and means for rotating the same, toothed bevel-gears fixedlysecured to said shaft, said gears being of different diameters, aset-shaft arranged at right angles to said power-shaft, a pair ofoppositely-disposed toothed bevel-gears loosely mounted upon theset-shaft and being continuously in mesh with the first-named gears, thedriven gears having their body portions formed with conical recesses, asleeve splined to the set-shaft between the last-named gears, saidsleeve having conical ends adapted for alternate reception in theconical recesses of said gears, and a handle operatively connected tosaid sleeve for sliding the same.

3. In combination with the frame, and a plurality oftransversely-arranged screw-shafts journaled therein, said screw-shaftsprojecting beyond one side of the frame and being provided with gears, aset-shaft journaled without the frame and being arranged at right anglesto said screw-shafts, gears on said setshaft meshing with thefirst-named gears, a power-shaft journaled in the frame parallel to thescrew-shafts, and having one of its ends projecting beyond one of theframe sides, a bevel-gear tixedly secured to the projecting' end of saidpower-shaft, similar gears loosely mounted on the set-shaft and meshingtherewith, and a clutch device mounted on the set-shaft between thegears thereof whereby either of said gears can be engaged with theset-shaft.

In testimony whereof we aflix our signatures in presence of twowitnesses.

ROSS WV; TULLOCH. PIERRE BARNES. Witnesses:

HENRY S. NOON, L. H. ROGERS.

IOC

IIO

